Form for concrete work.



R. T. BAGBY.

FORM FOR CONCRETE WORK.

A APPLICATION FILED 8.15.19 17- 1,235,542

Patented Au 7,1917.

3 SHEETS-SHEET 1.

R. T. BAGBY.

FORM FOR CONCRETE WORK.

APPLICATION man FEB- 15.19 11.

Patented Au 7, 1917.

3 SHEETS-SHEET 2.

R. T. B-AGBY. FORM FOR CONCRETE WORK. APPLICATION FILED FEB 15' I9?- Patented Aug. 7, 1917.

3 SHEETS-SHEET 3.

anili UNITED STATES PATENTMOFFICE.

noBEnT T. BAGBY, 0E MASCOT, TENNESSEE.

EonM FOR CONCRETE wonx.

1,235,542. Specification of Letters Patent.

Application filed February 15, 1917. Serial 110. 148,812.

T 0 all whom it may concern.

duced as needed. One object of the invention is to provide an apparatus which the component parts may be readlly separated after the concrete has set so that the form may be used repeatedly and it is also the object. of the invention to provide an apparatus of the stated characterlstlcs which may be easily handled by one man so that the cost of labor will be minimized. The invention is illustrated in the accompanying drawings and consists in certain novel features which will be hereinafter described and claimed. I

In the drawings:

Figure l is a transverse section of a retaining wall constructed by the a1d of my invention; I

v Fig. 2 is a front elevation of the same;

Fig. '3 is a transverse section showing the application of the inventlon to the construction of sewers, conduits or similar formations;

Figs. 4 and 5 are views showlng different applications of the lnvention to form girders of beams and floors;

Fig. 6 is a horlzontal section showlng the use of the invention in the building of columns; Q v

Figs. 7 and 8 are enlarged'detail vlews showing the joint between abutting form of T-iron, as indicated in Fig. 7,-or may be constructed of a timber post 2 having a flexible metallic plate 3 secured to. one edge,

the longitudinal edges of said metallic plate projecting beyond the sides of the timber,-

as shown in Fig. 8. The form plates 4 each have a channeled formation and consists of a central-webor body 5 having flanges 6 upon their longitudinalv edges with the extremities of said flanges turned inwardly, as shownat 7. In the endsof the flanges 6 are longitudinally extending notches or open-ended ,slots 8 which are adapted to enga e the, side flanges of the ribs when the orm plates are assembled in use and inwardly projecting ribs 9 are formed upon the inner faces of the form plates at the ends thereof and betweenthe flanges 6, as clearly shown in Figs. 7, 8 and 9. The form plates may be constructed with openings 10 in the flanges 6 to receive pins or similar fastenings whereby to retain links 11 in position, the said links, when held to the form plates by said pins, preventing longitudinal separation of the plates.

' Patent ed Aug. 7,1917.

In building a retaining wall by the use 7 of my. invention, the ribs or standards 1' are set up along the line of the proposed wall and the standard at one side of the wall is inclined to correspond to the inclination of the outer face of the wall, as will be readily understood. The rib may be secured in this inclined position by any 'convenient or preferred means and I have shown a brace 12 having its upper end connected with the inclined rib and. its lower end held by a stake 13 which may be of any ordinary construction. The brace 12, of course, will rest upon the ground so that additional strength will be imparted to the device and the strain of holding the rib in position will not be thrownentirely upon the stake 13. The form plates may be of various sizes, as indicated in Figs. 1 and 2, and are placed in position so that their flanged sides will be between the ribs 1 and the intended wall, the unflanged sides of the plates thereby presenting a smoothsurface against which the concrete may be poured and tamped so that after the concrete has set and the form removed a wall having smooth surfaces will result. In as sembling the form plates with the ribs 1, the ends of the plates are brought against the sides of the ribs so that the notches 8 will engage over the, sideflanges of the ribs,'.the projecting portions of the lips '7 thereby engaging against the outer faces of said ribs while the inner walls of the ,slots or notches 8 will fitza'gainst the inner faces of the ribs, as clearly shown in' Fig.

7. The ribs 9 of adjacent plates will abut and will thereby constitute stops to prevent rocking of the plates relative to each other and the plates are then qonnected, so as to be held against longitudinal separation, by fitting the links 11 between the -lips 7 and the main webs 5 of the plates and dropping holding pins or bolts therethrough. The flanges 6 should be formed at a right angle to the webs'of the form plates so that eachplate will form a firm support for the plate superposed upon 1t. In order to produce an overhanglng finish to the wall, a channel plate14 without the elements 7 and 9 may be employed at the top of the wall, said plate belng reversed relative to the plates below it so that its flanges will project toward the wall and a .cornice havin desired material will be inserted between the uppermost form plates and will serye to force the plates around the rib lnto lntimate contact with each other and, consequently,

, will cause them to present a smooth continuous surface against which the concrete may set. After the concrete has set, if this key 17' be withdrawn, the form-will be loosened so that it may be readily removed from the formed sewer. same process will be followed while if it be desired to impart an arch shape to the upper surface of the wall of the sewer or culvert the form plates 18 are fitted to the inner side In forming culverts, the" of the ribs 19, the concretebeing forced down under the form plates, as will be readily understood. It will, of course, be understood that the ribs 16 and 19 are of bendable material so that they may be readily given the desired form and will retain said form until they are removed from the completed work.

In utilizing my improved form for the construction of floors and beams, I employ shoring 20 which will be built up to the desired height and at its top will be provided withia' boTster 21 upon which a form plate 22 may directly rest, the said form plate 22 being of the proper dimensions to give the desired shape to the lower'side or edge of the beam 23. At the sides of the form plate also engaged by the ends of the form plates. 26 by which the sides of the beam 23 are 22, I provide angle irons 24: which will extend longitudinally of the beam 23 and be 60 supported by the bolsters 21. Near their ends, the bolsters engage the ribs 25 which are shaped. Extending longitudinally of the beam and supported by the upper ends of meet in front of the standards the ribs 25 are ribs 2'1 having the stems of their T-shapes resting in the notches in the upper ends of said ribs and their heads arranged to engage the ends of the form plates 28 arranged horizontally and extending outwardly from the upper ends of the uppermost form plates 26. The concrete for forming the floor will be deposited upon the form plates 28 and the uppermost flanges of the upper form plates 26, and some of the concrete will pass down between the form plates 26 so as to develop the beam 23.

The arrangement just described is illustrated in Fig. 4 as will have been readily noted. The arrangement shown in Fig. 5 differs from the just described arrangement in providing a rib 29 between the upper end of the side rib 30 and the form plates which support the concrete for the floor. The said ribs 29 are turned so that their stems project away from the beam and their upper- .most edges will support ribs 31 extending under the form plates 32 upon which the concrete for the floor is placed. The ends of the form plates 32 are engaged with the ribs 31 in the manner heretofore described.

The ribs 25 or 30 will be provided with notches 38 in the edges of their flanges to receive longitudinal flanges on the bolsters 21, said bolsters being held in engagement with the ribs 'by clamps 39 which fit tightly around the bolsters, it being understood that the bolsters are arranged in pairs with the members of a pair disposed at oppositesides of a rib.

Informing a column by the use of my in vention, the form plates 33 are placed end to end vertically and clamping bars 34 are placed around the form plates and held totion with the accompanying drawings.

Having thus described the invention, what is claimed as new is 1. An apparatus for the purpose set forth comprising retaining standards, and form plates provided on one side along both longitudinal edges with inwardly projecting flanges whereby the plates may be superposed, said flanges being constructed at their ends to engage around the retaining standards whereby the ends of the plates may 2. apparatus for the purpose set forth comprlslng a ,Ill) T-shaped in cross section, and form plates provided on one side along both longitudinal edges with inwardly projecting flanges whereby the plates may be superposed, said flanges being constructed at their ends to engage around the flanges of the T-shaped rib and meet in front of the irlib with the outer surfaces of the form plates ush.

3. In an apparatus for the purpose set forth, the combination of a rib T-shaped in cross section, and form plates provided with longitudinal flanges having notches in their ends and having longitudinal lips at their inner edges, the said flanges engaging the side edges of the T-shaped rib with the said lips bearing against the inner face of the said rib.

4. A form plate for concrete work consisting of a web having inwardly projecting flanges extending along both side edges and having inwardly extending lips along the free edges of said flanges, the webs being further provided at their ends with inwardly extending ribs of less width than the flanges along the side edges of the web.

5. In an apparatus for the purpose set forth, the combination of a rib T-shaped in cross section, form plates provided with longitudinal'flanges having notches in their ends and having longitudinal lips at their inner edges, the said notches engaging the side edges of the T-shaped rib with the said lips bearing against the inner face of the said rib, links bridging the abutting ends of the plates, and means for holding said links to said plates.

In testimony whereof I aflix my signature.

' ROBERT T. BAGBY. [n s.] Witnesses:

HARRY L. LAWSON, J. WARREN GILBERT. 

